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(No Model.)

L. P. CONVERSE.

AIR HEATER FOR STOVES.

No. 336,392. Patented Feb. 16, I886.

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UNITED STATES LYMAN P. CONVERSE,

PATENT OF ICE.

OF NEYV YORK, N. Y.

AIR-HEATER FOR STOVES.

SPECIFICATION forming part of Letters Patent No. 336,392, dated February 16, 1886.

Application filed August '22, 1885.

To all whom, it 71mg concern.-

Be it known that I, LYMAN P. CONVERSE, a citizen of the United States, residingin New York, in the county and State of New York, have invented certain new and useful Iniprovements in Air Heaters for Stoves, of which the following is a specification.

My invention relates to the class of apparatus designed to be applied to kerosene or other stoves for the purpose of obtaining there from as large a volume of heated air as is practica-ble.

My invention consists, generally, in an inclosed chamber provided with inlets and an outlet for the passage of the air, and special means for retaining the air within the chamher in close proximity to the surface or sur faces which are heated by the flame of the stove, whereby the air as it passes receives a large amount. of heat in a brief period.

In the accompanying drawings, which illustrate my invention, Figure l is an elevation, partly in section, of a heater embodying my invention; and Fig. 2 is an inverted plan view of the interior portion of the device.

The heater is preferably made in three parts, the upper outer portion, A, being conical in form and having the opening 0 at the top. The lower portion, B, is of the same diameter as the base of the upper portion, and has the openings I) b, preferably extending entirely around the lower edge. A central piece, 0, is held by its edge between the upper and lower portions, and is of approximately the same shape as the upper portion, having the opening 0 at its top. The three parts are fastened together by the screws S, which pass through the heater, and have the nuts N at the lower end. The central portion of the bottom plate. B, is preferably made concave, as shown at B, whereby the best effects of the heat are secured.

The heater is designed to be placed directly over the flame of the kerosene or gas stove, or it may be placed upon an ordinary stove, covering one of the holes above the fire. The interior of the plate 0 has cast or otherwise fixed to its lower surface the curved projections or partitions c a, which extend from the lower surface down toward the bottom plate of the heater. The partitions or projections are in the form of rings, as shown in Fig. 2, and concentric with each other, and extending inward to the edge of the opening 0; but

these rings are not continuous, having open- Sorial No. 175,071. (No model.)

ings x an, arranged in the manner shown in Fig. 2, the openings in the successive partitions not being opposite each other, but each opening being opposite the middle of the next ring.

The operation of the heater is as follows: \Vhen it is placed upon a kerosene or other stove, so that the bottom of the heater is directly exposed to the heat, the air passes in through the openings 1) 1) around the bottom edge of the heater, and, striking against the side of the outer or nearest partition, 0, it passes in the direction shown by the arrows around and through the openings in the partitions c successively until it reaches the opening 0, where it passes into the upper chamber, and so on through the opening 0 out of the heater into the air. The greater volume of the air will of course rest against the under part of the plate 0, and so remain under the influence of the heat radiated from the bottom of the plate of the heater for a considerable period, thereby both becoming intensely heated, and also imparting its heat to the plate 0 and the air above it in the upper chamber. By this organization the air in passing through the heater is brought into contact with an extensive surface of metal, and will thus be raised to a very high temperature.

A chimney of any desired length may be placed over the opening 0, in order to create a stronger draft, and thereby force through the heater as large a quantity of air to be heated as will be found practicable.

1 claim as my invention 1. The combination, substantially as hereinbefore set forth, of the upper chamber, A,

having the opening 0 at its top, the lower chamber, B, having the inletopenings b, and the interior plate or partition, (J, having the projections c, substantially as described.

2. The combination, substantially as hereinloefore set forth, with the chambers A and B, of the interior plate, 0, having the concentrio projections or partitions c, said projections or partitions having the openings w, arranged in alternate order, substantially as set forth.

In testimony whereof I have hereunto subscribed my name this 7th day of July, A. D. 1885.

LYMAA P. CONVERSE.

\Vitnesses:

DANL. W. EDGEOOMB, CHARLES A. TERRY. 

